Hair Cells

Hair cells are the sensory receptors of both the auditory system and the vestibular system in all vertebrates. The auditory hair cells are located within the organ of Corti on a thin basilar membrane in the cochlea of the inner ear.

Image from Wellcome images, Credit Dr. David Furness, Creative Commons (link)

Hair cell of inner ear
A scanning electron microscope image of the sensory hair bundle of an inner hair cell from a guinea pig’s hearing organ in the inner ear.
Vibrations made by sound cause the hairs to be moved back and forth, alternately stimulating and inhibiting the cell. When the cell is stimulated
it causes nerve impulses to form in the auditory nerve, sending messages to the brain.

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